Microsoft Azure Administrator Associate AZ-104 Practice Question

The administrator should verify that the health probes are configured properly and that the backend VMs are responding to them. Azure Load Balancer uses health probes to determine which backend instances are healthy and able to receive traffic. If the health probes are misconfigured or the VMs are not responding correctly (e.g., because the web server service is not running), the load balancer will not send traffic to them. Checking the health probe configuration and VM responsiveness is the first step in troubleshooting this issue.

Checking if Azure Firewall is blocking traffic may not be relevant if there is no firewall configured, or if the issue is with the health probes rather than network policies. Ensuring that the load balancer's SKU matches that of the backend VMs is not relevant, as load balancer SKU does not need to match VM SKU. Increasing the instance count of the load balancer is unnecessary and will not resolve a connectivity issue; it is used for scaling purposes.